/opt/etc/ndm/ifstatechanged.d hook parameters

---- Fri Feb  8 18:29:01 MSK 2019 ----
change='up'
connected='yes'
link='up'
up='down'
---- Fri Feb  8 18:29:01 MSK 2019 ----
change='config'
connected='yes'
link='up'
up='down'
---- Fri Feb  8 18:29:01 MSK 2019 ----
change='link'
connected='no'
link='down'
up='down'
---- Fri Feb  8 18:29:01 MSK 2019 ----
change='link'
connected='no'
link='down'
up='down'


---- Fri Feb  8 18:29:06 MSK 2019 ----
change='up'
connected='no'
link='down'
up='up'
---- Fri Feb  8 18:29:06 MSK 2019 ----
change='config'
connected='no'
link='down'
up='up'
---- Fri Feb  8 18:29:12 MSK 2019 ----
change='link'
connected='yes'
link='up'
up='up'



case "$change-$up" in
        config-down)
            ...
            ;;
        config-up)
            ...
            ;;
esac